Initial OpenEcomp A&AI Logging Service commit

Change-Id: Ie67c5746c2aeafc0fa4318b5ba7ef8af1b3a2eda
Signed-off-by: Steve Smokowski <ss835w@att.com>

7 files changed, 621 insertions, 0 deletions

diff --git a/logging-api/pom.xml b/logging-api/pom.xml
new file mode 100644
index 0000000..4c4470e
--- /dev/null
+++ b/logging-api/pom.xml
@@ -0,0 +1,41 @@
+<!--
+     ============LICENSE_START=======================================================
+  Common Logging Library
+  ================================================================================
+  Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+  ================================================================================
+  Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+  
+     http://www.apache.org/licenses/LICENSE-2.0
+  
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+  ============LICENSE_END=========================================================
+   -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.openecomp.aai.logging-service</groupId>
+        <artifactId>logging-service</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+	<groupId>org.openecomp.aai</groupId>
+	<artifactId>logging-api</artifactId>
+	<name>Common Logging API</name>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>1.7.5</version>
+		</dependency>
+	</dependencies>
+</project>
diff --git a/logging-api/src/main/java/org/openecomp/cl/api/LogFields.java b/logging-api/src/main/java/org/openecomp/cl/api/LogFields.java
new file mode 100644
index 0000000..87b3f3f
--- /dev/null
+++ b/logging-api/src/main/java/org/openecomp/cl/api/LogFields.java
@@ -0,0 +1,84 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Common Logging Library
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.cl.api;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class LogFields {
+
+  /** Map of field names to values. */
+  private Map<Integer, String> fields = new HashMap<Integer, String>();
+
+  /**
+   * Retrieve the contents of the specified field entry.
+   * 
+   * @param field
+   *          - The field to retrieve the value for.
+   * 
+   * @return - The value associated with the specified field, or null if there
+   *         is no such entry.
+   */
+  public String getField(Enum field) {
+    return fields.get(field.ordinal());
+  }
+
+  /**
+   * Assigns a value to a specific field.
+   * 
+   * @param field
+   *          - The field to assign a value to.
+   * @param value
+   *          - The value to assign to the field.
+   * 
+   * @return - The {@link LogFields} object (this is useful for parameter
+   *         chaining.
+   */
+  public LogFields setField(Enum field, String value) {
+    fields.put(field.ordinal(), value);
+    return this;
+  }
+
+  /**
+   * Assigns a value to a specific field.
+   * 
+     * @param field - The field to assign a value to.
+     * @param value - The value to assign to the field.
+   * 
+   * @return - The {@link LogFields} object (this is useful for parameter
+   *         chaining.
+   */
+  public LogFields setField(Enum field, int value) {
+    fields.put(field.ordinal(), String.valueOf(value));
+    return this;
+  }
+
+  /**
+   * Determines whether or not a value has been assigned to a particular field.
+   * 
+   * @param field - The field to be checked.
+   * 
+   * @return - true if an entry exists for the specified field, false otherwise.
+   */
+  public boolean fieldIsSet(Enum field) {
+    return fields.containsKey(field.ordinal()) && (fields.get(field.ordinal()) != null);
+  }
+}
diff --git a/logging-api/src/main/java/org/openecomp/cl/api/LogLine.java b/logging-api/src/main/java/org/openecomp/cl/api/LogLine.java
new file mode 100644
index 0000000..2b6f30f
--- /dev/null
+++ b/logging-api/src/main/java/org/openecomp/cl/api/LogLine.java
@@ -0,0 +1,115 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Common Logging Library
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.cl.api;
+
+import org.openecomp.cl.mdc.MdcContext;
+import org.openecomp.cl.mdc.MdcOverride;
+
+import org.slf4j.MDC;
+
+/**
+ * This class is used to help standardize how log lines are written and provide
+ * profiling info.
+ */
+public abstract class LogLine {
+
+  public static enum LogLineType {
+    AUDIT, ERROR, METRICS
+  }
+
+  /**
+   * Enumerates the predefined fields of the log line. Note that this
+   * enumeration only exposes those fields that the client may set via the
+   * {@link LogFields} object. Fields which are automatically populated by the
+   * logging service or sourced from the {@link MdcContext} do not appear here.
+   */
+  public enum DefinedFields {
+
+    STATUS_CODE, 
+    RESPONSE_CODE, 
+    RESPONSE_DESCRIPTION, 
+    INSTANCE_UUID, 
+    SEVERITY, 
+    SERVER_IP, 
+    CLIENT_IP, 
+    CLASS_NAME, 
+    PROCESS_KEY, 
+    TARGET_SVC_NAME, 
+    TARGET_ENTITY, 
+    ERROR_CODE, 
+    ERROR_DESCRIPTION, 
+    CUSTOM_1, 
+    CUSTOM_2, 
+    CUSTOM_3, 
+    CUSTOM_4;
+  }
+
+  protected String component = "";
+  protected String logCode = "";
+  protected String level = "";
+  protected String message = "";
+  protected MdcOverride override = new MdcOverride();
+  protected LogFields fields = new LogFields();
+
+  /**
+   * Sets common values that the log line will use for populating the log
+   * string.
+   * 
+   * @param component
+   *          - The entity invoking the log.
+   * @param logCode
+   *          - String version of the log message code.
+   * @param level
+   *          - Log level (DEBUG, TRACE, INFO, WARN, ERROR...)
+   * @param msg
+   *          - The log message
+   * @param fields
+   *          - A map of predefined log line fields to values.
+   * @param override
+   *          - Structure which overrides selective fields in the
+   *          {@link MdcContext}
+   */
+  public void init(String component, String logCode, String level, String msg, LogFields fields,
+      MdcOverride override) {
+
+    this.component = component;
+    this.logCode = logCode;
+    this.level = level;
+    this.message = msg;
+    this.override = override;
+    this.fields = fields;
+  }
+
+  protected String getMdcValue(String attribute) {
+    if (override.hasOverride(attribute)) {
+      return override.getAttributeValue(attribute);
+    }
+
+    String value = (String) MDC.get(attribute) == null ? "" : (String) MDC.get(attribute);
+    return value;
+  }
+
+  public abstract String getFormattedLine();
+
+  protected String fieldValue(Enum field) {
+    return (fields.fieldIsSet(field) ? fields.getField(field) : "");
+  }
+}
diff --git a/logging-api/src/main/java/org/openecomp/cl/api/Logger.java b/logging-api/src/main/java/org/openecomp/cl/api/Logger.java
new file mode 100644
index 0000000..2b428e5
--- /dev/null
+++ b/logging-api/src/main/java/org/openecomp/cl/api/Logger.java
@@ -0,0 +1,216 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Common Logging Library
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.cl.api;
+
+import org.openecomp.cl.mdc.MdcOverride;
+
+/** Defines the common API which all Logger implementations must expose. */
+public interface Logger {
+
+  /**
+   * Indicate whether or not TRACE level logging is enabled.
+   *
+   * @return true if TRACE level logs are enabled, false otherwise
+   */
+  public boolean isTraceEnabled();
+
+  /**
+   * Indicate whether or not INFO level logging is enabled.
+   *
+   * @return true if INFO level logs are enabled, false otherwise
+   */
+  public boolean isInfoEnabled();
+
+  /**
+   * Indicate whether or not ERROR level logging is enabled.
+   *
+   * @return true if ERROR level logs are enabled, false otherwise
+   */
+  public boolean isErrorEnabled();
+
+  /**
+   * Indicate whether or not WARNING level logging is enabled.
+   *
+   * @return true if WARNING level logs are enabled, false otherwise
+   */
+  public boolean isWarnEnabled();
+
+  /**
+   * Indicate whether or not DEBUG level logging is enabled.
+   *
+   * @return true if DEBUG level logs are enabled, false otherwise
+   */
+  public boolean isDebugEnabled();
+
+  /**
+   * Log an INFO message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode
+   *          - Log message identifier.
+   * @param arguments
+   *          - Arguments to populate the log message template with.
+   */
+  public void info(Enum logCode, String... arguments);
+
+  /**
+   * Log an INFO message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode
+   *          - Log message identifier.
+   * @param fields
+   *          - Map containing values for any log fields which the client wants
+   *          to populate.
+   * @param arguments
+   *          - Arguments to populate the log message template with.
+   */
+  public void info(Enum logCode, LogFields fields, String... arguments);
+
+  /**
+   * Log an INFO message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+     * @param logCode   - Log message identifier.
+     * @param fields    - Map containing values for any log fields which the 
+     *                    client wants to populate.
+     * @param override  - A set of values to override values stored in the MDC context
+     * @param arguments - Arguments to populate the log message template with.
+   */
+  public void info(Enum logCode, LogFields fields, MdcOverride override, String... arguments);
+
+  /**
+   * Log a WARNING message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+     * @param logCode   - Log message identifier.
+     * @param arguments - Arguments to populate the log message template with.
+   */
+  public void warn(Enum logCode, String... arguments);
+
+  /**
+   * Log a WARNING message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param fields    - Map containing values for any log fields which the 
+   *                    client wants to populate.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void warn(Enum logCode, LogFields fields, String... arguments);
+
+  /**
+   * Log a TRACE message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void trace(Enum logCode, String... arguments);
+
+  /**
+   * Log a TRACE message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param fields    - Map containing values for any log fields which the 
+   *                    client wants to populate.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void trace(Enum logCode, LogFields fields, String... arguments);
+
+  /**
+   * Log a simple, non-templated DEBUG message.
+   * 
+   * @param logMessage - The message to be logged.
+   */
+  public void debug(String logMessage);
+
+  /**
+   * Log a DEBUG message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void debug(Enum logCode, String... arguments);
+
+  /**
+   * Log a DEBUG message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param fields    - Map containing values for any log fields which the 
+   *                    client wants to populate.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void debug(Enum logCode, LogFields fields, String... arguments);
+
+  /**
+   * Log an ERROR message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void error(Enum logCode, String... arguments);
+
+  /**
+   * Log an ERROR message based on a message key defined in a resource bundle
+   * with arguments.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param fields    - Map containing values for any log fields which the 
+   *                    client wants to populate.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void error(Enum logCode, LogFields fields, String... arguments);
+
+  /**
+   * Log an ERROR message based on a message key defined in a resource bundle
+   * with arguments and a throwable exception.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param ex        - The exception to be logged.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void error(Enum logCode, Throwable ex, String... arguments);
+
+  /**
+   * Log an ERROR message based on a message key defined in a resource bundle
+   * with arguments and a throwable exception.
+   * 
+   * @param logCode   - Log message identifier.
+   * @param fields    - Map containing values for any log fields which the 
+   *                    client wants to populate.
+   * @param ex        - The exception to be logged.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public void error(Enum logCode, LogFields fields, Throwable ex, String... arguments);
+
+  /**
+   * Format the given log using the supplied arguments
+   * @param logCode   - Log message identifier.
+   * @param arguments - Arguments to populate the log message template with.
+   */
+  public String formatMsg(Enum logCode, String... arguments);
+
+}
diff --git a/logging-api/src/main/java/org/openecomp/cl/api/LoggerFactoryInterface.java b/logging-api/src/main/java/org/openecomp/cl/api/LoggerFactoryInterface.java
new file mode 100644
index 0000000..c990881
--- /dev/null
+++ b/logging-api/src/main/java/org/openecomp/cl/api/LoggerFactoryInterface.java
@@ -0,0 +1,43 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Common Logging Library
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.cl.api;
+
+/**
+ * Defines the common API that must be exposed by all LoggerFactory
+ * implementations.
+ */
+public interface LoggerFactoryInterface {
+
+  /**
+   * Returns the logger associated with the name.
+   * 
+   * @return Logger
+   */
+  public Logger getLogger(String name);
+
+  /**
+   * Returns the logger associated with the clazz.
+   * 
+   * @return Logger
+   */
+  public Logger getLogger(Class<?> clazz);
+
+}
diff --git a/logging-api/src/main/java/org/openecomp/cl/mdc/MdcContext.java b/logging-api/src/main/java/org/openecomp/cl/mdc/MdcContext.java
new file mode 100644
index 0000000..6e9e6f4
--- /dev/null
+++ b/logging-api/src/main/java/org/openecomp/cl/mdc/MdcContext.java
@@ -0,0 +1,78 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Common Logging Library
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.cl.mdc;
+
+import org.slf4j.MDC;
+
+import java.net.InetAddress;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+/**
+ * This class manages the MDC (mapped diagnostic context). Calling the init
+ * method when a new event is processed will save thread-specific context
+ * information which will be used when generating logs.
+ */
+public final class MdcContext {
+  public static String MDC_REQUEST_ID = "RequestId";
+  public static String MDC_SERVER_FQDN = "ServerFQDN";
+  public static String MDC_SERVICE_NAME = "ServiceName";
+  public static String MDC_PARTNER_NAME = "PartnerName";
+  public static String MDC_START_TIME = "StartTime";
+  public static String MDC_REMOTE_HOST = "RemoteHost";
+  public static String MDC_SERVICE_INSTANCE_ID = "ServiceInstanceId";
+  public static String MDC_CLIENT_ADDRESS = "ClientAddress";
+
+  /**
+   * Initializes the fields of the Mapped Diagnostic Context.
+   * 
+   * @param transId          - Unique transaction identifier.
+   * @param serviceName      - The name of the service generating the diagnostic.
+   * @param serviceInstance  - Unique identifier of the specific instance 
+   *                           generating the diagnostic.
+   * @param partnerName      - Name of the entity initiating the transction to 
+   *                           be logged
+   * @param clientAddress    - IP address of the transaction client.
+   */
+  public static void initialize(String transId, 
+                                String serviceName, 
+                                String serviceInstance,
+                                String partnerName, 
+                                String clientAddress) {
+    MDC.clear();
+    MDC.put(MDC_REQUEST_ID, transId);
+    MDC.put(MDC_SERVICE_NAME, serviceName);
+    MDC.put(MDC_SERVICE_INSTANCE_ID, serviceInstance);
+    MDC.put(MDC_PARTNER_NAME, partnerName);
+    MDC.put(MDC_CLIENT_ADDRESS, clientAddress);
+    MDC.put(MDC_START_TIME,
+        new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX").format(new Date()));
+
+    try {
+      MDC.put(MDC_SERVER_FQDN, InetAddress.getLocalHost().getCanonicalHostName());
+    } catch (Exception e) {
+      // If, for some reason we are unable to get the canonical host name, we
+      // just want to leave the field unpopulated.  There is not much value
+      // in doing anything else with an exception at this point.
+    }
+
+  }
+}
diff --git a/logging-api/src/main/java/org/openecomp/cl/mdc/MdcOverride.java b/logging-api/src/main/java/org/openecomp/cl/mdc/MdcOverride.java
new file mode 100644
index 0000000..413ce36
--- /dev/null
+++ b/logging-api/src/main/java/org/openecomp/cl/mdc/MdcOverride.java
@@ -0,0 +1,44 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * Common Logging Library
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.cl.mdc;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This class stores a map of MDC context attribute/values which can be used to
+ * override the actual MDC context.
+ */
+public class MdcOverride {
+  private Map<String, String> overrides = new HashMap<String, String>();
+
+  public void addAttribute(String attr, String val) {
+    overrides.put(attr, val);
+  }
+
+  public String getAttributeValue(String attr) {
+    return overrides.get(attr);
+  }
+
+  public boolean hasOverride(String attr) {
+    return overrides.containsKey(attr);
+  }
+}